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Unfortunately, Oracle encounters undo corruption while running. Of course, the best way is to completely recover it. But what if undo is damaged without backup? The following describes how to solve this problem. If you need a friend's reference, if undo damage is unfortunate

In oracle, what is a sequence ?, Oracle sequence? Sequence: a database object provided by oacle to generate a series of unique numbers. L automatically provides unique values L shared object L mainly used to provide the primary key value L loading sequence values into memory improves access efficiency Creation sequenc

Welcome to the Oracle community forum and interact with 2 million technical staff. What is Oracle's policy for Linux? Oracle fully supports the Linux operating system. In fact, Oracle is the first commercial database for Linux. By

Why is Oracle expdp faster than exp? What is the principle? First read the official oracle 10g documentation: Database Utilities Data Performance Improvements for Data Pump Export and ImportThe improved performance of the Data Pump Export and Import utilities

Unfortunately, Oracle encounters undo corruption while running. Of course, the best way is to completely recover it. But what if undo is damaged without backup? The following describes how to solve this problem. For more information, see If undo damage is unfortunately encou

(1) Establish B*tree index 3:11:08 sql>create index Emp1_job_ind on EMP1 (Job); (2) Analysis of index structure 3:11:08 sql> ANALYZE INDEX emp1_job_ind VALIDATE STRUCTURE; Index analyzed. (3) View Index storage information 03:11:41 sql> SELECT blevel,leaf_blocks,num_rows from user_indexes 03:12:12 2 WHERE index_name= ' Emp1_job_ind '; Blevel Leaf_blocks Num_rows ---------- ----------- ---------- 0 1 14 03:12:26 sql> INSERT into the EMP1 SELECT * from EMP1; ---------self replication t

oracle| strategy What is Oracle's strategy for Linux? Oracle fully supports the Linux operating system. In fact, Oracle is the first commercial database available for Linux. By using Oracle's industry-leading offerings to support

# listener.ora Network Configuration File: C:\oracle\product\10.1.0\Db_1\NETWORK\ADMIN\listener.ora# Generated by Oracle configuration tools.SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = C:\oracle\product\10.1.0\Db_1) (PROGRAM = extproc) ) (SID_DESC = (GLOBAL_DBNAME = ORCL.192.168.2.110) (SID

By default, a PL/SQL external is installed.Program(EXTPROC) Entries in listener. in ora, It is a listener that Oracle calls the default configuration of external programs. Its name is EXTPROC or plsextproc, but it is generally not used and can be directly used from listener.

OCI: To install the Oracle client, the portability is slightly poor, the theoretical performance is betterTHIN: Belongs to TYPE4, pure Java implementation, good portability, theoretical performance slightly worseRecommendation: It is best to use thin driver bar, transplant better, use

What is the difference between Oracle 10g versions! Oracle 10g Standard Edition Enterprise Edition Oracle10g is divided into four versions:1. Oracle Database Standard Edition one, the most basic commercial version, including bas

In the actual work we often encounter some Oracle database performance is low, of course, the reasons for the low performance of Oracle database is various, we can through some correct design and diagnosis to try to avoid some Oracle database performance

path API. This format was very similar to the format stored in Oracle database datafiles inside of tablespaces. Therefore, no client-side conversion to inserts statement bind variables is performed.--Exported data file is block format, not exp SQL statementThe supported data access methods, direct path and external tables, i